Smokeless powder in muzzleloader?

I would never even think about things like buckhorn 209 in anything but a inline(it was made for inlines its a smokeless but a volume equivalent smokeless). smokeless in a muzzleloader is not something id even toy with they burn different and smokeless also needs some air space meaning you also need the leave a gap between the bullet and powder not a good idea.
 
25 grains is way too much powder... so I'm not surprised there. What I meant with my question was IF proper loading data was provided, essentially converting loads to smokeless. Shotgun shells were originally black powder (hence the dram equivalence system) and most shotguns can run fine on both black and smokeless. Shotgun shell loads are restricted to max pressures pf 10,000 psi - 12,000 psi, so that means smokeless doesn't necessarily mean high pressure. As I understand it, smokeless powder develops pressure based on grain size and how compact they are. So is that it, smokeless just isn't reliable in a muzzleloader because they can't compact it uniformly with the ramrod, even if it was using the slowest-burning largest grain powder out there? But if that was true, stuff like Blackhorn 209 would blow up guns.

Your post opens up another question, why DON'T manufacturers utilize better barrel metal for their muzzleloaders? I wouldn't mind paying extra for a safer gun, but I guess Savage already provided us that with their 110... Still every other manufacturer seems content to use the same low-carbon steel or free-machining stainless for all the blackpowder guns they sell. Why not provide the option of heat treated 4140, or even just 4130? I would want that extra margin of safety, even if I was just loading straight black powder, there would still be the risk of double loads and short stops.


Seanmp: I agree with you, if I ever get into muzzleloading, I would stay with powder and not even touch the pelletized stuff out of principle. But I'm just more interested in the technical aspect of why we can't use smokeless!

btw a lot of muzzleloader barrels are 4140 or 4130 but chromoly steels are not needed for black powder firearms with a lead bullet or plastic sabot(even though most inlines most likely use a chromoly barrel) chromoly steels are also more brittle and will split or break apart rather then bulging that softer less carbon steels do
 
Basically I think that if a person can ignore Black powder only warnings on muzzleloader barrels and ignore all data that states that using smokeless in a muzzleloader is dangerous and still think that they because they are smarter than everyone else can safely do it then I believe that we are all wasting our time because as Forrest Gump said stupid is as stupid does.
 
images
...the very best we could hope for...
 
I find it hard to believe what I am reading.


?

The over all theme of what you are reading is "don't use smokeless powder in a muzzle loader". The rest of the fluff doesn't matter.

If the OP chooses to, then it's his life to play Russian Roulette with...


Even the older repro cap and ball revolvers are black powder only - Uberti used different metallurgy in their cap and ball vs cartridge revolvers until more recently. Means if you use one of those conversion cylinders in one you ought to shoot BP cartridge loads thru it.
 
which comes back to my point of smokeless powder pressures going exponential beyond a certain point.

cheers mooncoon
It makes sense because smokeless powder burn rate increases exponentially with pressure. Black powder and substitutes' burn rates are significantly less sensitive to pressure.
 
Okay guys, I decided to disprove all of you who said I couldn't do it, and I loaded about 50 grains of Green Dot into the end of my .50 cal CVA in-line with a patched lead ball. What happened after I pulled the trigger was amazing, the ball flew out at the speed of light, did a spiral spin up into the air, than fell down to the ground with an explosion of green sparks and smoke, and Ozzy Osbourne emerged from the smoke and told me I had reached the Seventh Circle of Hell!!!





Alas, no - I did not post this thread with the expectation being egged on to do any physical experimentation, it was just technical small talk. Some of the comments seem to assume I was really stupid enough try? I was just curious, and wanted to know more, and of course I like to question people's answers - all part of learning from others. I wasn't really going to put smokeless into a piece of machinery that says not to (that would void the warranty!). In my field (aviation), using a single wrong bolt or installing flammable insulation instead of non-flammable would result in spectacular but tragic consequences (But we still need to know the "why" behind the "not").

For those that posted constructive answers, I really appreciate you sharing your knowledge with me. This question started out while I was reading about the history of smokeless, and there was mention of folks back in the day pouring the new and untried smokeless into their muzzle-loaders. Bad things happened, but I still wanted to know if it was practical with today's technology.

To summarize, smokeless powder in a muzzleloader is a bad idea because:

1. Less-than-desirable control circumstances within the muzzleloading system. You have to worry about air space, consistent weighing of small-amounts of powder in field conditions, compactness of powder, tightness of bullets in bore, etc. Smokeless is fine in BP systems that utilize cartridges, because in a cartridge you can control all these factors. Without this control, you get wildly fluctuating peak pressures.

2. Even if you built a front loader gun to withstand smokeless, there are a million of things that can go err, because human nature adds a whole bunch of factors to the equation of what can go wrong. Evidence as put by consumer experiences with the Savage ML.

3. A smokeless barrel is prohibitively expensive in a muzzleloader, at least for most of us when we purchase a single-shot firearm. I did a price check. a Green Mountain .50 cal 36" black powder barrel runs about 140 dollars, a custom .50 cal 36" barrel for something like a Barett M82 costs at least 450 dollars.

Why the difference? The black powder 50 cal is made from inexpensive 1137 steel stock with a tensile strength of 85,000 psi, and the smokeless 50 cal is made from 4140 chrome-moly steel that must be precisely heat-treated and tempered to a tensile strength of 120,000 psi. Than you have the tooling costs associated with machining a much harder/stronger steel.

4. After all the cost and risk factors, the advantage gain by shooting smokeless is little, except for ease of cleaning and reduction in corrosion.


So alas for these reasons, smokeless is simply too "wild" for the contemporary muzzle-loading system. It is analogous to using gasoline instead of water as the medium inside a steam engine. Possible, but with enormous risks.
 
f:P:...OMG, he's in the aviation field. I can read the headlines now!? And, the analogy is laboured to be polite.:wave:


Look, it wasn't my fault those Malaysian flyboys got lost, I followed the instructions to re-installing the navigation system as best I could...
 
Look, it wasn't my fault those Malaysian flyboys got lost, I followed the instructions to re-installing the navigation system as best I could...
Oh dear, don't tell us that you learned avionics off the internet!?! ;-)
If you have a technical orientation, there's a limited amount of free info available for learning the fundamental science of internal ballistics. I have found some resources in the form of declassified U.S. Army technical doc's, which require a certain level of grad-school-level math/physics/engineering. Wolf Publication's 'Pressure Factors' by Prof. Brownell (not the shooting supply guy) is an excellent introduction that gets fairly technical.
I can appreciate the curiosity when you ask questions and get replies from people who insist they know why you should never do something, as in "Thus it is written: thou shalt not!", without explaining why. My own experience has been to proceed very cautiously, only after extensive research.
 
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Mess around with smokeless powders in a muzzle loader and you just might make next year's Darwin Awards list..... and with a closed-casket funeral because of the breech plug imbedded in your forehead and maybe a hand or two missing.
 
Mess around with smokeless powders in a muzzle loader and you just might make next year's Darwin Awards list..... and with a closed-casket funeral because of the breech plug imbedded in your forehead and maybe a hand or two missing.

For the OP and anyone else dumb enough to not believe what we have said, maybe they will believe the manufacturer who actually did try it. Anyone who trys it themselves WILL qualify for the Darwin awards eventually.

https://www.youtube.com/watch?feature=player_embedded&v=gmsBF6CXs18
 
For the OP and anyone else dumb enough to not believe what we have said, maybe they will believe the manufacturer who actually did try it. Anyone who trys it themselves WILL qualify for the Darwin awards eventually.

https://www.youtube.com/watch?feature=player_embedded&v=gmsBF6CXs18

The video you shared has 120 grs (not 12.0, but 120.0) of HS-6 being used! The strongest bolt action rifle ever devised would explode into tiny pieces with 1/2 of that. So what exactly did the video prove with regards to this thread?
 
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